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Well, maybe not a problem, but prehaps s.o.p. I picked up the premier power plant at the RMAF, one of the demos they were using there. Five or six years ago, I previously had, for less than the 30 day return window, a pp 500, too noisy and it ran very hot, and kind of flattened my sound. Didn't like it. The PPP is a vast improvement, imo, but apparently not the final answer to my AC problem. I get what sounds like 100% pure AC during daylight hours. Starting around 5:00 P. M. it starts to go in the toilet and by six or so my system is unlistenable. This was the case sans any pc and with any pc I tried before the PPP, and they were many of the usual suspects. One model helped a little, a Running Springs Haley. Anyhow, I sold that when I got the PPP. Logic tells me the regenerated AC coming out of the PPP should be the same quality AC anytime of the day since, after all, it is regenerated power. Well, I have the same problem, but at a much lesser degree. Say if my system's sound is a 10 during the day, with the PPP it only gets to a 5-6 during the evening, when without the PPP it may have been a 3 or so. However, even reaching a level of 7 maybe, I am not inclined to listen much during those hours since it is much less enjoyble than during daylight hours. I guess my question is, why can't I get the same level of sound quality with the PPP at all hours of the day? Those evening hours are still not much fun. You guys know a lot more about this than I do. Any help?
Edits: 02/02/08 02/03/08 02/03/08 02/03/08
Unfortunately, the PPP and - for that matter - no device is perfect. The PPP regenerates the AC and this means that noise and distortion are lowered by a magnitude, but not eliminated. This is because as an amplifier delivering your AC it is not perfect. A typical passive filter will reduce noise levels above 100kHz by as much as 40dB. The PPP takes far lower frequencies and lowers their problems by a stunning 80dB. But, it still isn't perfect.
I wish it were. I am not sure why the system becomes SO bad - that seems to me to be a bit more than I would have expected. What's the distortion readings on the PPP when the power's good and bad?
It's ten to four right now, and the input thd is 5.0, the output 2.3. The sound is not at it's best right now, having deteriorated a little early today as it often does on Sundays for some reason. I'll check it later.
The PPP does help tremendously, but I guess I was expecting more.
Thanks, Paul.
There must be something wrong. My output THD is consistently 0.4 while the input THD varies between 1.4 and 2.8.
Not necessarily, it sounds ike the PPP is doing exactly what it should. There are other factors involved that the PPP metering system doesn't measure, like noise above 100kHz. You might try placing a Duet in front of the PPP. Maybe go to our online store - or a dealer's online store - get one and try it. If it works you can keep it, if not, return it and get your money back. By doing this, you can reduce the higher frequency noise and, while it won't eliminate it, you can at least see if it helps or does nothing, thus pointing you towards the answer.
Paul, I had a Duet, ordered at the same time as the PPP in Denver. I used it briefly with the PPP, but sent it back, since imo, it didn't make much difference, in fact, I prefered the sound without it. But go figure, I am using an old Ultimate Outlet with the PPP, and, obviously, prefer it to the Duet. Tonight the input THD is still 5.0, but the output is fluctuating between 2.1 and 2.2. I wish could get a .4 output like the other guy.
What is your input and output voltage?
Input voltage 120/121, output 122/123. It's 6:30 A.M. and the input THD is a rock solid 5.0, but the output THD is 1.6-1.8. There is a marked difference in the quality of the sound at the 1.7 THD output range compared to when it's 2.3 or 2.5.
You can probably change the output THD by adjusting the output voltage. If you're careful, there's a small set screw adjustment on the bottom of the PPP near the front panel. Adjust this with a small screwdriver from minimum distortion on the output, ignoring the resulting output voltage which is going to change somewhat.
Call Barrows if you need help.
Thanks, Paul. When I get the chance I'll call.
A month after getting the PPP, I got several audiophile fuses to install in amp, preamp, and blu-ray player. A week later, the improvements with audio and video were so obvious and the fuses worked with the PPP so well that I told myself, "Don't buy PPP without adding fuses to associated components".
I want to install up grade fuses in my Sony BDP-S1 and I cannot figure out how to take the thing apart, is this the Blue Ray player that you have?
No, mine is a Samsung something BD player. No matter what brand/model you have, just locate where on the rear the power cord is coming from. Unlug the machine. Eventually you still need to open the cover to reveal the fuse holder, figure out the fuse value and size (most likely small size).
No, mine is a Samsung something BD player. No matter what brand/model you have, just locate where on the rear the power cord is coming from. Unlug the machine. Eventually you still need to open the cover to reveal the fuse holder, figure out the fuse value and size (most likely small size).
Thanks, I'll keep this in mind. BTW, do you have a source you can give me for upscale fuses?
I bought my Hi-Fi Tuning fuses from The Cable Company (http://www.thecableco.com/). They can be obtained from Music Direct (www.amusicdirect.com). I also heard good things about PS Audio Critical Links and Isoclean fuses (http://www.aaudioimports.com/store/ProductDetail.asp?catID=38&subCatID=28&productID=71).
Thanks very much.
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